?97欧美精品系列一区二区_天天爽天天爽夜夜爽毛片_成人香蕉视频下载_国产亚洲tv在线观看 ,永久黄网站色视频免费网站_国产九九精品_91精品一区二区三区久久久久_亚洲精品三区 ,丰满大码女优AⅤ在线_免费看片免费播放_国产一区二区三区日韩精品_超碰www

久草免费在线视频观看,2020在线免费观看视频,日韩无砖无视频,天天爽天天狠久久久综合-久久黄色网站网址_嫩草影院视频无码永久_中国黄片免费在线看_欧洲在线视频一区二区

History of fiber cement siding

Thu,17 Jan 2019   15:27:15

 Early fiber cement panels used asbestos fibers to add strength. Ludwig Hatschek patented asbestos-reinforced fiber cement in Austria in 1901 and named it "Eternit", based on the Latin term "aeternitas", meaning everlasting. In 1903, Schweizerische Eternit-Werke AG began fabricating the material in the city of Niederurnen in Switzerland. Cellulose-reinforced fiber cement products were introduced 1980s as a safe replacement for the very widely-used asbestos cement products manufactured before that time.